gpxe/src/include/igmp.h

   1 #ifndef IGMP_H
   2 #define IGMP_H
   3
   4 #include "stdint.h"
   5 #include <gpxe/in.h>
   6
   7 #define IGMP_QUERY      0x11
   8 #define IGMPv1_REPORT   0x12
   9 #define IGMPv2_REPORT   0x16
  10 #define IGMP_LEAVE      0x17
  11 #define GROUP_ALL_HOSTS 0xe0000001 /* 224.0.0.1 Host byte order */
  12
  13 #define MULTICAST_MASK    0xf0000000
  14 #define MULTICAST_NETWORK 0xe0000000
  15
  16 enum {
  17         IGMP_SERVER,
  18         MAX_IGMP
  19 };
  20
  21 struct igmp {
  22         uint8_t         type;
  23         uint8_t         response_time;
  24         uint16_t        chksum;
  25         struct in_addr  group;
  26 } PACKED;
  27
  28 struct igmp_ip_t { /* Format of an igmp ip packet */
  29         struct iphdr ip;
  30         uint8_t router_alert[4]; /* Router alert option */
  31         struct igmp igmp;
  32 } PACKED;
  33
  34 struct igmptable_t {
  35         struct in_addr group;
  36         unsigned long time;
  37 } PACKED;
  38
  39 extern void join_group ( int slot, unsigned long group );
  40 extern void leave_group ( int slot );
  41
  42 #endif  /* IGMP_H */